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annotate libervia/backend/plugins/plugin_sec_autocrypt.py @ 4351:6a0a081485b8

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plugin autocrypt: Autocrypt protocol implementation: Implementation of autocrypt: `autocrypt` header is checked, and if present and no public key is known for the peer, the key is imported. `autocrypt` header is also added to outgoing message (only if an email gateway is detected). For the moment, the JID is use as identifier, but the real email used by gateway should be used in the future. rel 456
author Goffi <goffi@goffi.org>
date Fri, 28 Feb 2025 09:23:35 +0100
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4351
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
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1 #!/usr/bin/env python3
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2
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3 # Libervia plugin
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4 # Copyright (C) 2009-2025 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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10
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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15
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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18
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19 import base64
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20 from functools import partial
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21 from typing import TYPE_CHECKING, cast
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22 from typing import Literal
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23
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24 from pydantic import BaseModel, field_validator
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25 from twisted.internet import defer
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26 from twisted.words.protocols.jabber import jid
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27 from twisted.words.xish import domish
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28
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29 from libervia.backend.core.constants import Const as C
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30 from libervia.backend.core.core_types import MessageData, SatXMPPEntity
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31 from libervia.backend.core.i18n import _
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32 from libervia.backend.core.log import getLogger
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33 from libervia.backend.memory import persistent
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34 from libervia.backend.plugins.plugin_xep_0106 import XEP_0106
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35 from libervia.backend.plugins.plugin_xep_0131 import XEP_0131
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36 from libervia.backend.plugins.plugin_xep_0373 import get_gpg_provider
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37 from libervia.backend.tools.common import regex
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38
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39 if TYPE_CHECKING:
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40 from libervia.backend.core.main import LiberviaBackend
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41
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42 log = getLogger(__name__)
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43
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44
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45 PLUGIN_INFO = {
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46 C.PI_NAME: "Autocrypt",
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47 C.PI_IMPORT_NAME: "AUTOCRYPT",
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48 C.PI_TYPE: C.PLUG_TYPE_SEC,
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49 C.PI_MODES: C.PLUG_MODE_BOTH,
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50 C.PI_PROTOCOLS: [],
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51 C.PI_DEPENDENCIES: ["XEP-0106", "XEP-0131", "XEP-0373"],
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52 C.PI_RECOMMENDATIONS: [],
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53 C.PI_MAIN: "Autocrypt",
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54 C.PI_HANDLER: "no",
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55 C.PI_DESCRIPTION: _(
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56 "Autocrypt support, to automatically encrypt message to email gateways when "
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57 "suitable."
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58 ),
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59 }
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60
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61
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62 class AutocryptHeaderParseError(ValueError):
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63 """Raised when Autocrypt header parsing fails"""
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64
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65
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66 class AutocryptData(BaseModel):
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67 """Parsed Autocrypt header data.
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68
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69 @param addr: Email address for the key.
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70 @param keydata: Base64-encoded public key.
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71 @param prefer_encrypt: Encryption preference hint.
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72 """
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73
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74 addr: str
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75 keydata: str
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76 prefer_encrypt: Literal["mutual"] | None = None
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77
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78 @field_validator("addr")
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79 @classmethod
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80 def check_email(cls, value):
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81 value = value.strip()
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82 if not regex.RE_EMAIL.match(value):
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83 raise ValueError("Invalid email address")
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84 return value
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85
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86 @field_validator("keydata")
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87 @classmethod
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88 def validate_keydata(cls, value: str) -> str:
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89 """Validate keydata is proper base64"""
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90 try:
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91 base64.b64decode(value, validate=True)
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92 except ValueError as e:
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93 raise ValueError("Invalid base64 in keydata") from e
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94 return value.strip()
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95
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96 def to_header(self) -> str:
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97 """Generate the Autocrypt header.
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98
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99 @return: Formatted header value per Autocrypt specification.
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100 """
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101 parts = [f"addr={self.addr}", f"keydata={self.keydata}"]
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102
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103 if self.prefer_encrypt is not None:
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104 parts.append(f"prefer-encrypt={self.prefer_encrypt}")
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105
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106 return "; ".join(parts)
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107
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108
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109 def parse_autocrypt_header(header: str) -> AutocryptData:
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110 """Parse an Autocrypt header.
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111
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112 @param header: Raw Autocrypt header value
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113 @return: Parsed AutocryptData.
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114 @raise AutocryptHeaderParseError: Some required field is invalid or missing.
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115 """
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116 attributes = {}
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117 for part in header.split(";"):
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118 part = part.strip()
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119 if not part:
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120 continue
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121 if "=" not in part:
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122 # Ignore invalid parts
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123 continue
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124 key, value = part.split("=", 1)
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125 key = key.strip().lower()
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126 value = value.strip()
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127
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128 if key in {"addr", "keydata", "prefer-encrypt"}:
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129 attributes[key] = value
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130
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131 if not attributes.get("addr"):
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132 raise AutocryptHeaderParseError('Missing required "addr" attribute')
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133 if not attributes.get("keydata"):
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134 raise AutocryptHeaderParseError('Missing required "keydata" attribute')
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135
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136 try:
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137 return AutocryptData(
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138 addr=attributes["addr"],
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diff changeset
139 keydata=attributes["keydata"],
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
140 prefer_encrypt=attributes.get("prefer-encrypt"),
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
141 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
142 except ValueError as e:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
143 raise AutocryptHeaderParseError(f"Invalid Autocrypt header: {e}") from e
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
144
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
145
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
146 class Autocrypt:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
147
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
148 def __init__(self, host: "LiberviaBackend") -> None:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
149 self.host = host
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
150 log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
151 self._shim = cast(XEP_0131, host.plugins["XEP-0131"])
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
152 self._e = cast(XEP_0106, host.plugins["XEP-0106"])
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
153 host.trigger.add("message_received", self.message_received_trigger)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
154 host.trigger.add("sendMessage", self.send_message_trigger)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
155
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
156 def profile_connecting(self, client: SatXMPPEntity) -> None:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
157 # Sender already handled.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
158 client._autocrypt_seen: set[str] = set()
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
159 client._autocrypt_gpg_provider = get_gpg_provider(self.host, client)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
160
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
161 async def handle_autocrypt_data(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
162 self, client: SatXMPPEntity, mess_data: MessageData, autocrypt_data_raw: str
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
163 ) -> None:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
164 """Process Autocrypt header from XMPP email gateway
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
165
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
166 @param client: Client session.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
167 @param mess_data: Message data.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
168 @param autocrypt_data: Raw Autocrypt header value
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
169 @raise AutocryptHeaderParseError: For invalid header format
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
170 """
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
171 from_jid = mess_data["from"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
172 to_jid = mess_data["to"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
173 is_email_gateway = await self.host.memory.disco.has_identity(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
174 client, "gateway", "smtp", jid.JID(to_jid.host)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
175 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
176 if to_jid.resource or not is_email_gateway:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
177 log.warning("Ignoring Autocrypt header from non email gateway.")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
178 return
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
179
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
180 try:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
181 autocrypt_data = parse_autocrypt_header(autocrypt_data_raw)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
182 except AutocryptHeaderParseError as e:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
183 log.error(f"Invalid Autocrypt header: {e}")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
184 return
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
185
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
186 sender_email = self._e.unescape(from_jid.user)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
187 if sender_email != autocrypt_data.addr:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
188 log.warning(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
189 f"Sender email ({sender_email!r}) doesn't match autocrypt header address"
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
190 f" ({autocrypt_data.addr!r}), ignoring autocrypt data."
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
191 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
192 return
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
193
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
194 if sender_email in client._autocrypt_seen:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
195 log.debug(f"We have already handled {sender_email!r} , nothing to do.")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
196 return None
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
197 gpg_provider = client._autocrypt_gpg_provider
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
198 public_keys = gpg_provider.list_public_keys(sender_email)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
199 if not public_keys:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
200 log.debug(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
201 f"No public key found for {sender_email!r}, importing autocrypt data."
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
202 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
203 # FIXME: Maybe we should import the Autocrypt key in a separated location?
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
204 # Autocrypt is less secure than normal key management.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
205 gpg_provider.import_public_key(base64.b64decode(autocrypt_data.keydata))
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
206 else:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
207 log.debug(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
208 f"There are already known public key for {sender_email}, we skipt "
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
209 "autocrypt"
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
210 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
211 client._autocrypt_seen.add(sender_email)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
212
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
213 def _check_headers(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
214 self, client: SatXMPPEntity, mess_data: MessageData
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
215 ) -> MessageData:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
216 try:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
217 autocrypt_data = mess_data["extra"]["headers"]["autocrypt"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
218 except KeyError:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
219 pass
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
220 else:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
221 defer.ensureDeferred(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
222 self.handle_autocrypt_data(client, mess_data, autocrypt_data)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
223 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
224 return mess_data
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
225
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
226 def message_received_trigger(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
227 self,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
228 client: SatXMPPEntity,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
229 message_elt: domish.Element,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
230 post_treat: defer.Deferred,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
231 ) -> Literal[True]:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
232 post_treat.addCallback(partial(self._check_headers, client))
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
233 return True
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
234
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
235 async def add_autocrypt_header(self, client, mess_data: MessageData) -> MessageData:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
236 to_jid = mess_data["to"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
237 if await self.host.memory.disco.has_identity(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
238 client, "gateway", "smtp", jid.JID(to_jid.host)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
239 ):
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
240 gpg_provider = client._autocrypt_gpg_provider
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
241 # FIXME! We currently use from jid as email, but we would need to get sender
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
242 # email from gateway instead, as we don't know what is actually used, and it
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
243 # may differ from the JID.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
244 sender_email = mess_data["from"].userhost()
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
245 try:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
246 public_key = next(iter(gpg_provider.list_public_keys(sender_email)))
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
247 except StopIteration:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
248 log.debug("No public key found, can't set autocrypt header.")
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
249 return mess_data
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
250
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
251 exported_key = gpg_provider.export_public_key(public_key)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
252 autocrypt_data = AutocryptData(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
253 addr=sender_email,
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
254 keydata=base64.b64encode(exported_key).decode("ascii"),
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
255 prefer_encrypt="mutual",
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
256 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
257
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
258 mess_data["extra"].setdefault("headers", {})[
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
259 "autocrypt"
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
260 ] = autocrypt_data.to_header()
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
261 return mess_data
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
262
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
263 def send_message_trigger(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
264 self, client, mess_data, pre_xml_treatments, post_xml_treatments
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
265 ) -> Literal[True]:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
266 """Process the XEP-0131 related data to be sent"""
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
267
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
268 def add_headers(mess_data: MessageData) -> MessageData:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
269 extra = mess_data["extra"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
270 self.move_keywords_to_headers(extra)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
271 # Now we parse headers, if any.
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
272 if "headers" in extra:
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
273 headers_data = HeadersData(**extra["headers"])
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
274 message_elt = mess_data["xml"]
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
275 message_elt.addChild(headers_data.to_element())
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
276 return mess_data
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
277
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
278 post_xml_treatments.addCallback(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
279 lambda mess_data: defer.ensureDeferred(
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
280 self.add_autocrypt_header(client, mess_data)
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
281 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
282 )
6a0a081485b8 plugin autocrypt: Autocrypt protocol implementation:
Goffi <goffi@goffi.org>
parents:
diff changeset
283 return True